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From: fzsitvay@techbook.com (Frank Zsitvay)
Newsgroups: comp.sys.dec.micro
Subject: Re: Rainbow EchoMail Digest
Message-ID: <1991Feb11.105406.18630@techbook.com>
Date: 11 Feb 91 10:54:06 GMT
References: <Added.IbgeL4i00UkTA5rk9_@andrew.cmu.edu>
Organization: TECHbooks of Beaverton Oregon - Public Access Unix
Lines: 42

In article <Added.IbgeL4i00UkTA5rk9_@andrew.cmu.edu> theall@SSCTEMP.SAS.UPENN.EDU (George A. Theall) writes:
>
>Date:     8 Feb 91  07:33 -0500
>From:     GEORGE THEALL 
>To:       JACK ANDERSON 
>Subject:  RAINBOW MEMORY HELP 
>
>JA> The computer claims it has 256KB when checked in the SETUP screen.
>JA> Visual inspection of the motherboard reveals 8 4164 memory chips on the
>JA> main board and another 24 on a memory extension daughterboard.
>
>FM>No, there's no way to upgrade that board. And the fact that you have
>FM>256K  total memory indicates you have a Rainbow 100A, which is
>FM>not too good.
>
>   Agreed. The board you have, Jack, is useless if you want to expand
>beyond 256K. To do that you'll need a "memory adapter option"
>(PC1K1-AK) together with a "base memory module" (PC1XX-AD) which will
>give you up to 832K. [It may be possible to use some type of 8087
>board in place of the memory adapter but I don't know.]
>
>   A better approach is to swap in a 100B motherboard and then get a
>PC1XX-AD. There are a number of advantages to the 100B motherboard,
>not just in terms of memory.
>
>George

  JA, if you want to go the motherboard swap route, i have a 100b motherboard
with the pc100b memory expansion board that, if you populate it with 256k
drams, will give you a total of 896k and it will be a 100B to boot.
 
  i was asking $125 for both boards, but if you want it i'd settle for
$100 if you pay shipping.  both boards work.
 
  it wasn't all that long ago that i paid $100 alone for the memory
board itself, and that was with only one bank of 64k rams.


-- 
fzsitvay@techbook.COM - but don't quote me on that....

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